JPH0572327U - Small wheel - Google Patents

Abstract

(57) [Summary] [Object] To provide a small wheel that can be relatively easily manufactured without deteriorating the performance and strength of the wheel. [Structure] Slits 3 are formed on the outer peripheral surface of a wheel body 2 at predetermined intervals, and the bases of wing pieces 4 are fitted into the slits 3 and fixed to the wheel body 2 by welding in the slits 3. Since the base of the blade 4 is inserted into the slit 3 and welded to the wheel body 2, the molten metal is contained in the fitting gap between the slit 3 and the blade 4. Therefore,
The molten metal does not overflow into the corners formed by the surface of the winglet 4 and the outer peripheral surface of the wheel body 2, so that the pressure receiving area of the winglet 4 can be prevented from decreasing and the surface of the wheel body 2 can be kept smooth. It

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a small wheel having a large number of blades protruding from the outer peripheral surface of a wheel body.

[0002]

[Prior Art]

 When constructing a small wheel with a diameter of about 10 mm, conventionally, the wheel body was integrally formed with the blade by precision casting or injection molding of metal powder. However, in the case of such casting or injection molding, it is not possible to sufficiently reduce the thickness of the blade due to the strength, so some improvement has been required.

In order to reduce the thickness of the winglet while ensuring its strength, the winglet A formed by bending a thin plate as shown in FIG. 5 may be welded to the outer peripheral surface of the wheel body B. It is valid. However, in the case where the wing piece A is welded to the outer peripheral surface of the wheel body B in this way, as shown in the same figure, the molten metal is formed in the corner portion between the base surface of the wing piece A and the surface of the wheel body B. Since C adheres, the pressure receiving area of the winglet A is substantially reduced, and the smoothness of the surface of the wheel body B is impaired, which deteriorates the performance of the wheel.

[0004]

[Problems to be solved by the device]

 The present invention has been made in view of such circumstances, and an object thereof is to provide a small wheel that can be relatively easily manufactured without lowering the performance and strength of the wheel.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention forms slits on the outer peripheral surface of the wheel body at a predetermined interval, and fits the bases of the wing pieces formed of thin plate molded products into the slits. It is characterized by being welded and fixed to the wheel body in the slit.

[0006]

[Action]

 Since the base of the wing piece composed of a thin plate molded product is fitted in the slit of the wheel body, and the base of the wing piece is welded and fixed to the wheel body in the slit, the wing piece and the wheel body It is possible to increase the welding area with. Therefore, both the strength of the winglet and the joint strength between the winglet and the wheel body can be increased while reducing the thickness of the winglet to reduce the weight of the wheel.

Further, since the base of the blade is fitted in the slit and then the base is welded to the wheel body in the slit, the molten metal causes a gap between the slit and the blade to be fitted. It is housed inside. Therefore, the molten metal does not overflow into the corners due to the surface of the winglet and the outer peripheral surface of the wheel, and it is possible to prevent the reduction of the pressure receiving area of the winglet while ensuring the smoothness of the surface of the wheel body. The performance of will be higher.

[0008]

【Example】

 An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of a small wheel according to the present invention, FIG. 2 is a perspective view of a wheel body, FIG. 3 is a perspective view of a wing piece, and FIG. 4 is a connection state of the wheel body and the wing piece. It is sectional drawing shown.

In these drawings, a plurality of slits 3 each having an arc shape when viewed from the front are formed at equal intervals on the outer peripheral surface of a wheel body 2 having a mounting hole 1 formed through the central portion. Further, three projections 5 are provided on the base end surface of the blade 4 which is formed by forming a thin plate having a thickness substantially the same as the width of the slit 3 into an arcuate cross section.

Then, a current is applied between the blade 4 and the wheel body 2 while the base of the blade 4 is fitted into the slit 3 and the tip of the protrusion 5 is held in pressure contact with the bottom surface of the slit 3. By flowing, the projection 5 is melted by using this current, and the blade 4 is welded and fixed in the slit 3.

Therefore, the molten metal 6 generated by melting the protrusions 5 fills the fitting gap between the slit 3 and the blade piece 4 to firmly fix the blade piece 4 to the wheel body 2. Moreover, the molten metal 6 can be prevented from overflowing from the slit 3 by adjusting the size (volume) of the protrusion 5 and the current. Therefore, the reduction of the pressure receiving area of the blade 4 due to the outflow of the molten metal is prevented, and the smoothness of the surface of the wheel body 2 is ensured.

Further, since the blades 4 can be positioned by utilizing the slits 3, the workability of positioning the wheel body 2 and the blades 4 at the time of welding is enhanced. Furthermore, since the contact area (welding area) between the blade 4 and the wheel body 2 is increased, the fixing strength of the blade 4 is also increased.

In the embodiment, the case where the blade 4 is fixed to the wheel body 2 by resistance welding has been described, but a welding method can be selected according to the materials of the wheel body 2 and the blade 4. In any case, since the base of the blade 4 can be inserted into the slit 3 to position the blade 4 on the wheel body 2, the manufacturing (assembly) workability is improved.

[0014]

[Effect of the device]

 As is clear from the above description, according to the present invention, the base portion of the blade is fitted and welded in the slit formed in the outer peripheral surface of the wheel body. Therefore, the molten metal can be prevented from flowing out due to welding, the pressure receiving area of the blade can be reduced and the smoothness of the surface of the wheel body can be prevented, and the workability of assembling the wheel body and the blade can be improved. As a result, the bond strength between the two is also increased. Furthermore, since the winglets can be made of a thin plate molded product, a small and lightweight wheel with high performance can be provided at low cost.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a small wheel according to the present invention.

2 is a perspective view of the wheel body of FIG. 1. FIG.

3 is a perspective view of the winglet of FIG. 1. FIG.

FIG. 4 is a cross-sectional view showing a combined state of the wheel body and the blade of FIG.

FIG. 5 is a cross-sectional view showing a general welding structure of a blade and a wheel body.

[Explanation of symbols]

 1 Mounting hole 2 Wheel body 3 Slit 4 Wing piece 5 Protrusion 6 Molten metal

Claims (1)

[Scope of utility model registration request] 1. A wheel main body having slits formed at predetermined intervals on an outer peripheral surface thereof, and wing pieces each having a base portion fitted in the slit, the base portion of the wing piece being welded and fixed to the wheel main body in the slit. A small wheel characterized by that.